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a83bfabc8b
The 'fake use' asm gadget does not always keep variables alive. E.g., in rdar://57754659, llvm was unable to preserve two local variables despite the use of these gadgets. These variables were backed by a LoadInst and an ExtractValueInst respectively. Instead of emitting shadow copies for just those kinds of instructions, use shadow copies exclusively. This may cause more variables to appear in the debugger window before they are initialized, but should result in fewer variables being dropped. rdar://57754659
72 lines
4.0 KiB
Swift
72 lines
4.0 KiB
Swift
// RUN: %target-swift-frontend -emit-ir %s | %FileCheck %s
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// REQUIRES: objc_interop
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import Foundation
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@objc protocol SR_9035_P {
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func returnUnmanagedCFArray() throws -> Unmanaged<CFArray>
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}
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// CHECK-LABEL: define hidden swiftcc %TSo10CFArrayRefa* @"$s25unmanaged_objc_throw_func9SR_9035_CC22returnUnmanagedCFArrays0G0VySo0H3RefaGyKF"
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@objc class SR_9035_C: NSObject, SR_9035_P {
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func returnUnmanagedCFArray() throws -> Unmanaged<CFArray> {
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// CHECK: %[[T0:.+]] = call swiftcc { %swift.bridge*, i8* } @"$ss27_allocateUninitializedArrayySayxG_BptBwlF"(i{{32|64}} 1, %swift.type* @"$sSiN")
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// CHECK-NEXT: %[[T1:.+]] = extractvalue { %swift.bridge*, i8* } %[[T0]], 0
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// CHECK-NEXT: %[[T2:.+]] = extractvalue { %swift.bridge*, i8* } %[[T0]], 1
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// CHECK-NEXT: %[[T3:.+]] = bitcast i8* %[[T2]] to %TSi*
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// CHECK-NEXT: %._value = getelementptr inbounds %TSi, %TSi* %[[T3]], i32 0, i32 0
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// CHECK-NEXT: store i{{32|64}} 1, i{{32|64}}* %._value, align {{[0-9]+}}
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// CHECK-NEXT: %[[T4:.+]] = call swiftcc %TSo7NSArrayC* @"$sSa10FoundationE19_bridgeToObjectiveCSo7NSArrayCyF"(%swift.bridge* %[[T1]], %swift.type* @"$sSiN")
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// CHECK-NEXT: %[[T5:.+]] = bitcast %TSo7NSArrayC* %[[T4]] to %TSo10CFArrayRefa*
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// CHECK-NEXT: store %TSo10CFArrayRefa* %[[T5]]
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// CHECK-NEXT: call void @swift_bridgeObjectRelease(%swift.bridge* %[[T1]]) #{{[0-9]+}}
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// CHECK-NEXT: %[[T6:.+]] = bitcast %TSo10CFArrayRefa* %[[T5]] to i8*
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// CHECK-NEXT: call void @llvm.objc.release(i8* %[[T6]])
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// CHECK-NEXT: ret %TSo10CFArrayRefa* %[[T5]]
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let arr = [1] as CFArray
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return Unmanaged.passUnretained(arr)
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}
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}
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// CHECK: %[[T0:.+]] = call swiftcc %TSo10CFArrayRefa* @"$s25unmanaged_objc_throw_func9SR_9035_CC22returnUnmanagedCFArrays0G0VySo0H3RefaGyKF"
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// CHECK-NEXT: %[[T2:.+]] = load %swift.error*, %swift.error** %swifterror, align {{[0-9]+}}
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// CHECK-NEXT: %[[T3:.+]] = icmp ne %swift.error* %[[T2]], null
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// CHECK-NEXT: br i1 %[[T3]], label %[[L1:.+]], label %[[L2:.+]]
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// CHECK: [[L2]]: ; preds = %entry
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// CHECK-NEXT: %[[T4:.+]] = phi %TSo10CFArrayRefa* [ %[[T0]], %entry ]
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// CHECK-NEXT: %[[T5:.+]] = ptrtoint %TSo10CFArrayRefa* %[[T4]] to i{{32|64}}
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// CHECK-NEXT: br label %[[L3:.+]]
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// CHECK: [[L1]]: ; preds = %entry
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// CHECK-NEXT: %[[T6:.+]] = phi %swift.error* [ %[[T2]], %entry ]
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// CHECK-NEXT: store %swift.error* null, %swift.error** %swifterror, align {{[0-9]+}}
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// CHECK-NEXT: %[[T7:.+]] = icmp eq i{{32|64}} %{{.+}}, 0
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// CHECK-NEXT: br i1 %[[T7]], label %[[L4:.+]], label %[[L5:.+]]
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// CHECK: [[L5]]: ; preds = %[[L1]]
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// CHECK-NEXT: %[[T8:.+]] = inttoptr i{{32|64}} %{{.+}} to i8*
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// CHECK-NEXT: br label %[[L6:.+]]
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// CHECK: [[L6]]: ; preds = %[[L5]]
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// CHECK-NEXT: %[[T9:.+]] = phi i8* [ %[[T8]], %[[L5]] ]
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// CHECK-NEXT: %[[T10:.+]] = call swiftcc %TSo7NSErrorC* @"$s10Foundation22_convertErrorToNSErrorySo0E0Cs0C0_pF"(%swift.error* %[[T6]]) #{{[0-9]+}}
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// CHECK: call swiftcc void @"$sSA7pointeexvs"(%swift.opaque* noalias nocapture %{{.+}}, i8* %[[T9]], %swift.type* %{{.+}}) #{{[0-9]+}}
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// CHECK-NEXT: %[[T11:.+]] = bitcast %TSo7NSErrorCSg* %{{.+}} to i8*
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// CHECK: call void @swift_errorRelease(%swift.error* %[[T6]]) #{{[0-9]+}}
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// CHECK-NEXT: br label %[[L7:.+]]
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// CHECK: [[L4]]: ; preds = %[[L1]]
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// CHECK-NEXT: call void @swift_errorRelease(%swift.error* %[[T6]]) #{{[0-9]+}}
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// CHECK-NEXT: br label %[[L7]]
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// CHECK: [[L7]]: ; preds = %[[L6]], %[[L4]]
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// CHECK-NEXT: br label %[[L3]]
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// CHECK: [[L3]]: ; preds = %[[L2]], %[[L7]]
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// CHECK-NEXT: %[[T12:.+]] = phi i{{32|64}} [ 0, %[[L7]] ], [ %[[T5]], %[[L2]] ]
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// CHECK-NEXT: %[[T13:.+]] = bitcast %T25unmanaged_objc_throw_func9SR_9035_CC* %{{.+}} to i8*
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// CHECK-NEXT: call void @llvm.objc.release(i8* %[[T13]])
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// CHECK-NEXT: %[[T14:.+]] = inttoptr i{{32|64}} %[[T12]] to %struct.__CFArray**
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// CHECK-NEXT: ret %struct.__CFArray** %[[T14]]
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